Wheel



(No Model.)

A. KORTUM. POLISHING WHEEL.

'N 605,641. Patented June 14,1898.

H/ k I INVENTOR (111 an; K vtlm, W m f/ ATTORNEYS.

WITNESSES:

UNITED STATES PATENT OFFICE.

' ALBERT KORTUM, F BROOKLYN, NEW YoRK, ASSIGNOR TO Tun ZUCKER &

LEVETT & LOEB OOMPANY,'OF NEW YORK, N. Y.

POLISHING-WHEEL.

SPECIFICATION forming part of Letters Patent No. 605,641, dated June 14, 1898. Application filed December 21, 1697. Serial No. 662,846. (No model.)

My invention relates to rotary polishingwheels for cleaning and polishing the surfaces of metallic articles.

It has for its object to produce a wheel at once more economical, simple, and durable than any heretofore used.

My polishing-wheel consists of a wooden core perforated for the arbor or arbors on which the wheel issecured, with a polishingbody of bristles or fibers secured around the core by a waterproof cement and with wooden clamping-pieces fitted upon the ends of the core and having their grain running in a difprovided with open ends to receive the ends of the rotating arbor or arbors which hold and drive the wheel.

B indicates the polishing-body, composed of fibers or bristles,vwith their 'free ends constituting the circumference of the brush. The inner ends of the fibers or bristles are secured around the core A by means of a compacted waterproof cement C, surrounding the core in the formof a ring, The cement which I prefer to use. is composed, essentially, of

7 machine lubricating-oil, fish-glue, rosin, and

a drier, (such as chalk,) and I have secured good results when-substantially equal quantities of each ingredient are used in the mixture.

I am aware that polishing-Wheels have been made by securing fibers or bristles to a core and attaching them by bending them around wires fitted in holes or recesses in the core. This method tends to shorten the life of the wheel, because .the fibers or bristles are strained or broken by bending or doubling them, and they are very apt to break under the severe use towhich they are subjected. In addition'the boring of hubs and the proc ess of wiring are expensive.

Polishing-wheels are rapidly used up, and it is therefore of the highest importance that such wheels be constructed in an economical manner and that the cement which holds the fibers or bristles shall be well adapted to resist water.

In view of the fact that, say, seventy-five per cent. of the polishing-wheels or buffingwheels employed are used with water I have found that the waterproof cement described materially increases the useful life of the polishing-wheel.

The core Ais cut away at either end,whereby reduced collars D are formed, and a wooden clamping-ring E is fitted upon each of said ends, being held in position by the cement O.

The clamping-rings are'fitted upon the core the grain of the clamping-rings run in a direction difierent from the grain of the core, whereby the cracking or splitting of the core due to the strain given by forcing it on the shaft or by the clamping devices and to the swelling onwarping of the core whenwet is largely prevented. The use of thev waterproof cement is also advantageous in' preventing the water from reaching the wooden core.

What I claim is- 1. A polishing-Wheel having a wooden core, a radially-extending polishing-body secured to the core, and wooden clamping-rings fitted core, with the grain of the rings running in a [0 direction diiferent from the grain of the core.

In witness whereof I have hereunto signed my name this 14th day of December, 1897.

ALBERT KORTUM.

In presence of- II. BUCKMEN, J r., CHAS. E. TOMKINS. 

